ASTM_A_403_-_A_403M_-_16.pdf

Designation:A403/A403M16Standard Specification forWrought Austenitic Stainless Steel Piping Fittings1This standard is issued under the fixed designation A403/A403M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers wrought stainless steel fittingsfor pressure piping applications.21.2 Several grades of austenitic stainless steel alloys areincluded in this specification Grades are designated with aprefix,WP or CR,based on the applicable ASME or MSSdimensional and rating standards,respectively.1.3 For each of the WP stainless grades,several classes offittings are covered,to indicate whether seamless or weldedconstruction was utilized.Class designations are also utilizedto indicate the nondestructive test method and extent ofnondestructive examination(NDE).Table 1 is a generalsummary of the fitting classes applicable to all WP grades ofstainless steel covered by this specification.There are noclasses for the CR grades.Specific requirements are coveredelsewhere.1.4 This specification is expressed in both inch-pound unitsand in SI units.However,unless the order specifies theapplicable“M”specification designation(SI units),the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.1.6 This specification does not apply to cast steel fittings.Austenitic stainless steel castings are covered in SpecificationsA351/A351M,A743/A743M,and A744/A744M.2.Referenced Documents2.1 ASTM Standards:3A351/A351M Specification for Castings,Austenitic,forPressure-Containing PartsA743/A743M Specification for Castings,Iron-Chromium,Iron-Chromium-Nickel,Corrosion Resistant,for GeneralApplicationA744/A744M Specification for Castings,Iron-Chromium-Nickel,Corrosion Resistant,for Severe ServiceA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA960/A960M Specification for Common Requirements forWrought Steel Piping FittingsE112 Test Methods for Determining Average Grain SizeE165 Practice for Liquid Penetrant Examination for GeneralIndustry2.2 ASME Standards:4ASME B16.9 Factory-Made Wrought Steel Butt-WeldingFittingsASME B16.11 Forged Steel Fittings,Socket-Welding andThreaded2.3 MSS Standards:5MSS SP-25 Standard Marking System for Valves,Fittings,Flanges,and UnionsMSS SP-43 Standard Practice for Light Weight StainlessSteel Butt-Welding FittingsMSS SP-79 Socket-Welding Reducer InsertsMSS SP-83 Steel Pipe Unions,Socket-Welding andThreadedMSS SP-95 Swage(d)Nipples and Bull PlugsMSS SP-97 Integrally Reinforced Forged Branch OutletFittingsSocket Welding,Threaded and ButtweldingEnds1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for PipingApplications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 1956.Last previous edition approved in 2015 as A403/A403M 15.DOI:10.1520/A0403_A0403M-16.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-403 in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.5Available from Manufacturers Standardization Society of the Valve and FittingsIndustry(MSS),127 Park St.,NE,Vienna,VA 22180-4602,http:/www.mss-.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.4 ASME Boiler and Pressure Vessel Code:4Section VIII Division ISection IX2.5 AWS Standards:6A 5.4 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Covered Welding ElectrodesA 5.9 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Welding Rods and Bare Elec-trodesA 5.11 Specification for Nickel and Nickel-Alloy WeldingElectrodes for Shielded Metal Arc WeldingA5.14 Specification for Nickel and Nickel-Alloy Bare Weld-ing Rods and Electro